fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
...
fio: (g=0): rw=randrw, bs=4K-256K/4K-256K, ioengine=posixaio, iodepth=8
Starting 3 threads
Threads: 3
Threads: 3
Threads: 3: [mmm] [13.6% done] [ 11889/  9290 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [17.4% done] [  9188/ 12076 kb/s] [eta 00m:19s]
Threads: 3: [mmm] [22.7% done] [ 10502/  9774 kb/s] [eta 00m:17s]
Threads: 3: [mmm] [27.3% done] [ 10616/  9623 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [30.4% done] [ 13235/  6308 kb/s] [eta 00m:16s]
Threads: 3: [mmm] [34.8% done] [ 17966/  1061 kb/s] [eta 00m:15s]
Threads: 3: [mmm] [39.1% done] [ 13093/  4262 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [41.7% done] [ 10486/  5422 kb/s] [eta 00m:14s]
Threads: 3: [mmm] [45.8% done] [ 10404/  4917 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [48.0% done] [  5849/  7854 kb/s] [eta 00m:13s]
Threads: 3: [mmm] [52.0% done] [ 12938/  1252 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [53.8% done] [ 11299/   504 kb/s] [eta 00m:12s]
Threads: 3: [mmm] [57.7% done] [  5426/  5775 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [59.3% done] [  4885/  5259 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [60.7% done] [  4344/  4844 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [62.1% done] [  6837/  2534 kb/s] [eta 00m:11s]
Threads: 3: [mmm] [63.3% done] [  3607/  4600 kb/s] [eta 00m:11s]
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27942, got signal=6
fio: ioengines.c:195: td_io_queue: Assertion `(io_u->flags & IO_U_F_FLIGHT) == 0' failed.
fio: pid=27943, got signal=6
Threads: 1: [m__] [64.5% done] [  1773/  3839 kb/s] [eta 00m:11s]
Threads: 1: [V__] [72.4% done] [ 12109/   264 kb/s] [eta 00m:08s]
Threads: 1: [V__] [95.7% done] [ 30970/     0 kb/s] [eta 00m:01s]
fio: (groupid=0): err= 0: pid=27941
  read : io=99MiB, bw=4,675KiB/s, runt= 22295msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=    1, max=  981, avg=59.39, stdev=61.47
    bw (KiB/s) : min=   41, max=29176, per=57.42%, avg=6111.82, stdev=7742.82
  write: io=43,564KiB, bw=2,158KiB/s, runt= 20665msec
    slat (msec): min=    0, max=    0, avg= 0.00, stdev= 0.00
    clat (msec): min=   24, max=  775, avg=105.04, stdev=58.71
    bw (KiB/s) : min=    0, max= 8705, per=48.74%, avg=2856.04, stdev=2577.94
  cpu          : usr=0.31%, sys=0.36%, ctx=7805
  IO depths    : 1=0.2%, 2=1.6%, 4=21.0%, 8=77.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.1%, 4=1.3%, 10=9.9%, 20=10.9%, 50=17.3%, 100=29.4%
     lat (msec): 250=30.2%, 500=0.1%, 750=0.3%, 1000=0.1%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27942
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.0%, 8=94.7%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=0.4%, 50=7.7%, 100=53.3%
     lat (msec): 250=38.1%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%
fio: (groupid=0): err= 0: pid=27943
  cpu          : usr=0.00%, sys=0.00%, ctx=0
  IO depths    : 1=0.1%, 2=0.1%, 4=5.6%, 8=94.2%, 16=0.0%, 32=0.0%, >=64=0.0%
     lat (msec): 2=0.0%, 4=0.0%, 10=0.0%, 20=1.3%, 50=6.5%, 100=54.0%
     lat (msec): 250=37.6%, 500=0.0%, 750=0.0%, 1000=0.0%, >=2000=0.0%

Run status group 0 (all jobs):
   READ: io=226MiB, aggrb=10,644KiB/s, minb=0KiB/s, maxb=4,675KiB/s, mint=0msec, maxt=22295msec
  WRITE: io=116MiB, aggrb=5,860KiB/s, minb=0KiB/s, maxb=2,158KiB/s, mint=0msec, maxt=22295msec

Disk stats (read/write):
  cciss!c0d0: ios=4216/2291, merge=605/81, ticks=41816/32812, in_queue=74624, util=98.22%
0.21user 0.74system 0:23.08elapsed 4%CPU (0avgtext+0avgdata 0maxresident)k
463680inputs+236584outputs (0major+2451minor)pagefaults 0swaps